... nitrate 1) purity:99.3%, 2)appearance:white crystal 3) good quality in competitive price 4) ISO9001 99.3% min sodium nitrate for ... First class grade Qualified gradeSodium nitrate(based on dried basis),%≥ 99.7 99.3 98.5 Water content,% ≤ 1.0 1.5 ... dried basis),%≤ 0.05 0.10 ----- Ferrum(Fe),%≤ 0.005 99.3% min sodium nitrate for explosive